I don't understand why we can't have a Plus-1 system. It seems like an extraordinarily easy fix. It doesn't solve everything, but it improves the system.
As for Bama vs. OKSU, I guess I lean toward Bama. They killed everyone on their schedule, except for the #1 team in the country, who they played to a standstill. I know LSU vs. Alabama was a defensive struggle, and to some a boring game. However, it showed that the teams are extremely, extremely close. If LSU is the #1 team in the country, Alabama is very close behind them.
OKSU, on the other hand, played several close games, and they lost to a mediocre team. They played an amazing game against Oklahoma, but they have a very bad loss on their resume. That just has to count for more than Alabama's overtime loss against the best team in the country.